Does your PowerPoint presentation look differently when you are presenting from a different computer?

With online editing and sharing of docs (Word), sheets (Excel), and slides (Powerpoint) your problems will be solved....Getting started with Docs

Let's start by getting introduced to Docs - an online replacement for Microsoft Word. The following tutorial will walk you through a number of steps to become more familiar with Docs. The same can be repeated for Sheets (replaces Excel) and Slides (replaces PowerPoint).

Assignment (10 minutes): Complete the "Introduction to Docs" tutorial by creating, editing, and sharing a new Doc.

Working OFFLINE
Perhaps the most important recent feature update to Google Apps (Docs, Slides, and Sheets) is the ability to work offline without an Internet connection. By enabling "Offline Mode" within Google Drive, you'll have access to edit all of your files from a Chrome browser wherever you are - even when WIFI is spotty or unavailable.